While the inability to control traffic demands is very much evident, the provision of roadway facilities is far from being adequate to keep proper pace with these ever increasing demands. Moreover, attempts to solve Bangkok traffic problems are still emphasized mainly on the traditional approach of building more roads. To make the matter worse, the concerned authorities still concentrate on “moving vehicles”rather than “moving people”. The utilization of more efficient and higher capacity modes of public transportation systems have not been given appropriate attention and priority in alleviating these chaotic conditions. In Southeast Asia, apart from Kuala Lumpur, Bangkok is the only other major Metropolis that does not yet avail itself of a mass transit rail system 2. Moreover, the existing main public transportation mode which is bus transit, does not function to the expectations of serving commuters. The overcrowded buses as shown in Figure 3, poor and unreliable services, excessive waiting time are commonly noticed in Bangkok